Removal of the Oil Tank Deaerator [PW11]

TASK 79-11-03-000-801-A
Removal of the Oil Tank Deaerator

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 400

1. Reason for the Job
Use this procedure to remove the deaerator from the oil tank.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	COVER - PROTECTION
No specific	1	STEPLADDER 0.5 M (1.6 FT)
PWA211186	1	EXTRACTOR MAIN GEARBOX

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 79-00-00-680-801-A	Drain the Engine Oil
TASK 79-35-21-000-801-A	Removal of the Oil-Debris Monitoring (ODM) Sensor
Removal of the Oil Tank Deaerator

3. Job Set-up
Subtask 79-11-03-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 79-11-03-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
(2) Put a STEPLADDER 0.5 M (1.6 FT) in position.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 79-11-03-680-050-A ** ON A/C NOT FOR ALL

A. Drain the engine oil from the oil tank (Ref. AMM TASK 79-00-00-680-801).

Subtask 79-11-03-010-052-A ** ON A/C NOT FOR ALL

B. Remove the Oil-Debris Monitoring (ODM) sensor (Ref. AMM TASK 79-35-21-000-801).

Subtask 79-11-03-020-050-A ** ON A/C NOT FOR ALL

C. Removal of the Oil Tank Deaerator
(1)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(a)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(b) Remove the three bolts (1) and the bracket (2) from the deaerator and tube (LB03) (3).
(c) Remove and discard the packing (4).
(d)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(e) Remove and discard the seal (15).
(f)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(g) Remove the four bolts (27), the two clamps (26) and the tube (LB03) (3) from the fan case and two brackets.
(2)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(a) Install the PWA211186 EXTRACTOR MAIN GEARBOX onto the vent valve (37) packing groove.
(b) Make sure that the PWA211186 EXTRACTOR MAIN GEARBOX is engaged to the vent valve (37) correctly.
(c) Turn the PWA211186 EXTRACTOR MAIN GEARBOX handle to engage the two jaws to the vent valve (37).
(d) Pull up on the PWA211186 EXTRACTOR MAIN GEARBOX handle and remove the vent valve (37) from the deaerator (50).
(e) Remove the vent valve (37) from the PWA211186 EXTRACTOR MAIN GEARBOX.
(f) Remove and discard the packing (38).
(3)

Removal of the Oil Tank Deaerator ** ON A/C NOT FOR ALL

(a) Remove the four bolts (48) and the four washers (49) from the deaerator (50).
(b) Install the two jackscrews to the deaerator (50) to disengage and remove it from the oil tank.
(c) Remove and discard the packing (51).
(4) Installation of the protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install all the necessary COVER - PROTECTION to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 03:41:26 UTC